Manufacture of artificial stone.



No. 754,550. 'PATENTBD MAR. 15, 1904.

P. w. DUNN. MANUFACTURE OF ARTIFICIAL STONE.

APPLICATION FILED SEPT. 5, 1903.

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-No. 754,550. PATENTBD MAR. 15, 1904.

' F. W. DUNN. MANUFACTURE OF ARTIFICIAL STONE.

APPLIUATION FILED SEPT, 5. 1903. V I0 n'onnL. z sums-sum 2.

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I No. 754,550.

UNITED STATES Patented March 15, 1904.

PATENT OFFICE.

FREDERICK w; DUNN, OF WOODSTOCK, CANADA, AssICNO OF ONE-HALF TO NEILMCPHEDRAN, GEORGE L. WHITNEY, JACOB H NRY FRANK, AND HENRYJOHN FINKLE,OF woODsroCK, CANA A.

MANUFACTURE OF ARTIFICIAL STONE.

SPECIFICATION forming part of Letters Patent No. 754,550, dated March15, 1904.

Application filed September 5, 1903. Serial No. 172,077. (No model.)

To all whom it may concern.-

Be it kno wn'that I, FREDERICK WALKING- TON DUNN, of Woodstock, in thecounty of Oxford, Province of Ontario, Canada, have in- 5 vented certainnew and useful Improvements in an Apparatus for the Manufacture ofArtificialStone; and I hereby declare that the following is a full,clear, and exact description of the same.

I My invention has reference to a novel apparatus for the shaping ofartificial stone when in a powdered, granular, or semidry condition andwhen the articles to be produced do not require to be formed under aheavy pressure.

In the manufacture of this class of artificial stone the siliceous andcementing materials, such as sand and cement or sand and line, arecombined in the proper proportionsand thoroughly mixed together in'theirpowdered or granular state in order that the particles of sand maybecome coated with the finer particles'of cement or lime. The mixture isthen slightly moistened and placed in a mold, where it is tamped into acompact homogeneous mass of the requisite density. To so construct this'mold that the artificial stone can beeasily and properly molded is oneof the objects of the present invention, a further object of theinvention being to so construct the mold that it will deliver its moldedcontents without shattering the fragile structure.

In carrying out the invention the bottom of the mold consists of aremovable follow-board or pallet detachably connected to the drag bymeans of suitable clamping elements. To facilitate the delivery of themolded stone, the drag is made in sections hinged together and providedwith a suitable locking element, by means of which they are rigidly heldin their closed position. To these sections are secured the grippingelements for holding the removable follow-board or pallet in its properrelation to the other parts of the molding'apparatus, as hereinaftermore fully set forth, and

45 more particularly pointed out in the claims.

In the drawings, Figure 1 is a perspective view of the completeapparatus. Fig. 2 is a perspective View of the base or bed, showing itfitted with a stationary core to be used in conjunction with the dragfor the purpose of [forming hollow building-blocks. Fig. 3 is aperspective view of the drag, showing the sections opened to allow thedelivery of the molded blocks. Fig. 4 is a perspective view of'thefollow-board or pallet which forms the detachable bottom for the drag.Fig. 5 is a perspective view of the molded block or stone.

Like letters of reference refer to like parts throughout thespecification and drawings.

The molding apparatus consists of a base element A, which may be of anysuitable size and shape and which is so constructed as to be easilytransportable in order that it can be readily moved from place to placeas required during the carrying on of the operations ofmanufacturing theartificial stone or building blocks. Projecting upwardly from the middleof the base A is a stationary core B, and removably mounted on the baseelement A is an apertured follow-board or pallet 0, through the apertureD of which projects the stationary core B. This follow-board or pallet Gconstitutes the bottom of the drag E, to which it is detachablyconnected by means of gripping elements F, secured to the sides of thedrag in such a manner that they will detach themselves. from thefollow-board as the hinged sections G and H composing the drag E areopened to permit of the delivery of the molded contents. Thedrag-section Gr consists of a side member I and an end member J,integrally formed or securely united together, and the drag-section Hconsists of corresponding side and end members K and L, respectively,the side member K being secured to the end member J by means of hingesM, which while rigidly uniting the sections at one end permit of thembeing opened to allow of the delivery of the mold contents. Fastened tothe outer faces of each of the side members I and K are handle-bars O,which project beyond the end members J and L and are fitted withhandgrips P. When the drag-sections G and H are closed together, thelocking-bar or locking element Q, engages the adjacent end of thehandle-bars to rigidly hold the hinged sections in their closedposition, this locking bar or locking element Q having at its endhook-shaped catches R to engage the handlebars 0 in such a manner thatwhile they enable the locking-bar to hold the sections securely closedthey permit of the locking-bar being easily detached from thehandle-bars to allow of the opening of the section. During the processof manufacturing the artificial stone the silicious and cementingmaterials are combined in the proper proportions and thoroughly mixed ina dry state. The mixture is then slightly moistened preparatory to beingplaced in the mold. The followboard is then placed on the base elementA, with the core B projecting through the aperture D, and thedrag-sections are closed together and locked in their closed position bymeans of the locking elements Q, the gripping elements F being so'arranged that they engage the follow-board or pallet E and securelyconnect it temporarily to the drag. The moistened mixture of sand andcement is then placed in the drag and tamped into a compact homogeneousmass of the requisite density, the mold during the process of tampingforming it into the requisite shape. When the stone has been shaped, themold, with its molded contents, is lifted clear of the stationary coreand carried to the place where the follow-board or pallet and the moldedstone or blocks are to be deposited. The locking element is then removedand the drag-sections are opened to disengage the gripping elements fromthe follow-board or pallet, which, with the molded stone, isdeposited'where the stone is to be treated to the indurating process.Another follow-board or pallet is then detachably connected to the drag,the sections of which are again securely connected by the locking-baror'locking element Q and placed upon the base element, as abovedescribed.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In amold for the manufacture of artificial stone the combination of abottom member, a mold-box therefor consisting of side and end membershinged together and arranged to be opened and closed laterally duringthe use of the apparatus, grappling members secured to the side membersof the mold-box, to engage the bottom members and secure the mold-boxthereto when'the parts are in their assembled position and a lockingdevice to securely hold the side and end members of the mold-box intheir closed position.

2. In amold for the manufacture of artificial stone the combination of abottom member, a mold-box therefor consisting of side and end membershinged together and arranged to be opened and closed laterally duringthe use of the apparatus, grappling members secured to the side membersof the mold-box to engage the bottom member and secure the mold-boxthereto when the parts are in their assembled position, handles for theside members of the mold-box and a detachable locking-bar arranged toengage the handles and lock the side and end members of the mold-box intheir closed position.

3. In a mold for the manufacture of artificial stone the combination ofan apertured bottom member, a mold-box therefor consisting of side andend members hinged together and arranged to be opened and closedlaterally during the use of the apparatus, grappling members secured tothe side members of the moldbox to engage the bottom member and securethe mold-box thereto when the parts are in their assembled position,handles for the side members of the mold-box and a detachablelocking-bar arranged to engage the handles and lock the side and endmembers of the moldbox in their closed position and a core for the basemember corresponding to the aperture in the bottom member of the mold.

4. In a mold for the manufacture of artificial stone the combination ofa bottom member, a mold-box therefor consisting of side and end membershinged together and arranged to be opened and closed laterally duringthe use of the apparatus, grappling members secured to the side membersof the mold-box to engage the bottom member and secure the mold-boxthereto when the parts are in their assembled position, handles for theside members of the mold-box, a detachable locking-bar arranged toengage the handles and lock the side and end members of the mold-box intheir closed position and a core for the base member corresponding tothe aperture in the bottom member of the mold.

Woodstock, August 5, 1903.

F. WV. DUNN.

In presence of H. J. FINKLE, C. H. RICHES.

